JP6434132B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device.

  A technique for attaching a communication function module that can be attached to a ceiling or a wall surface and that can use various functions to a ceiling light is disclosed in Patent Document 1 below.

  Furthermore, the following Patent Document 2 discloses an illumination device with an image projection device that enables a spatial effect combining illumination light and video.

JP 2003-16831 A JP 2012-186118 A

  However, the above-described prior art only discloses a block diagram and a simple external shape as a projector, and considers a function for freely moving and adjusting the projection position of the image from the projector in the lighting device. Is not disclosed.

  In general, a lighting device having a video projection function is used by being mounted on a ceiling surface. At that time, an image projected from a projector is placed at a desired position, for example, on a surface of a table or the like placed indoors. Installed and adjusted to project to position. However, there is a case where it is desired to change the position at which the image from the projector is projected with a change in the arrangement of furniture or the like in the room. In that case, the ceiling of the entire lighting device having the image projection function is generated. It is necessary to re-install and adjust the mounting position (also referred to as the installation position) on the surface or wall, and it is inconvenient for the user to include the work for that. That is, the above-described conventional technology has not yet been sufficiently considered for the function of moving and adjusting the projection image in the illumination device having the image projection function.

  Accordingly, the present invention has been achieved in view of the above-described problems in the prior art, and the object thereof is to more suitably move and adjust the position at which an image is projected even after the apparatus is installed. An object of the present invention is to provide an illuminating device having a video projection function.

  To achieve the above object, according to the present invention, there is provided an illuminating device that emits illuminating light, which is held by a holder for fixing to a ceiling surface or a wall, and the illuminating light disposed inside a housing. A light source for generation, a diffusion plate attached to a part of the casing, a diffusion plate for diffusing illumination light from the light source, and a space formed by a part of the casing and the diffusion plate There is provided an illuminating device that is provided and includes a projector that projects an image on a projection surface, and a moving unit that allows the whole or a part of the projector to move in a direction parallel to the projection surface. .

  According to the present invention described above, there is provided an illuminating device having a video projection function capable of moving and adjusting a position where an image is projected more suitably even after the device is installed.

It is the perspective view which showed the external appearance structure of the illuminating device which has a video projection function which becomes one embodiment of this invention with the use environment. It is a figure explaining the outline of the internal structure of the illuminating device which has the said image | video projection function. It is a block diagram which shows the detailed circuit structure inside the said illuminating device. It is the upper surface, side surface, and bottom view explaining the internal structure of the illuminating device which becomes Example 1 of this invention. It is the perspective view which expanded a part and showed with the cross section in order to demonstrate the detail of the rotation mechanism in the illuminating device which becomes the said Example 1. FIG. It is a figure explaining operation | movement of the rotation mechanism in the illuminating device which becomes the said Example 1. FIG. It is a figure which shows the movement and rotation of a projection image | video accompanying the movement to the X-axis-Y-axis direction of the projector main body in the said Example 1, and rotation centering on a Z-axis direction. It is the upper surface, side surface, and bottom view explaining the internal structure of the illuminating device which becomes Example 2 of this invention. It is an expansion | deployment perspective view for demonstrating the detail of the rotation mechanism in the illuminating device which becomes the said Example 2. FIG. It is a bottom view which shows the modification of the illuminating device which becomes the said Example 2. FIG. It is a figure for demonstrating the relative position variable function of the display element and projection optical system which are utilized in the illuminating device which becomes Example 3 and Example 4 of this invention. It is the upper surface, side surface, and bottom view explaining the internal structure of the illuminating device which becomes Example 3 of this invention. It is the perspective view shown with the cross section for demonstrating the detail of the moving mechanism of the relative position of the projector and projection lens in the illuminating device which becomes the said Example 3. FIG. It is a figure which shows the movement and rotation of a projection image | video accompanying the movement to the X-axis-Y-axis direction of the projector main body in the said Example 3, and rotation centering on a Z-axis direction. It is the upper surface, side surface, and bottom view explaining the internal structure of the illuminating device which becomes Example 4 of this invention. It is an expansion | deployment perspective view for demonstrating the detail of the moving mechanism of the projection lens in the illuminating device which becomes the said Example 4. FIG. It is a figure which shows the movement and rotation of a projection image | video accompanying the movement to the X-axis-Y-axis direction of the projection lens in the said Example 4. FIG. It is sectional drawing for demonstrating the detail of the moving mechanism of the projection lens in the illuminating device which becomes Example 5 of this invention. It is a figure which shows the movement and rotation of the projection image | video accompanying the movement to the X-axis-Y-axis direction of the projector main body and the projection lens in Example 5 and rotation centering on the Z-axis direction.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  First, FIG. 1 shows an external configuration of a lighting device with a video projection function according to an embodiment of the present invention. In particular, FIG. 1 shows a so-called pendant that is attached in a form of being hung from a ceiling surface. A lighting device with a video projection function in which a video projection function is mounted on a lighting device called a mold is shown. However, the present invention is not limited to this, and may be applied to a so-called ceiling-type lighting device that is attached to a ceiling surface as described later.

  As is clear from FIG. 1, the lighting device 10 with a video projection function is used by being attached to, for example, a wall surface, a ceiling surface 50, or the like constituting a space such as a kitchen, a dining room, a living room, or an office. . More specifically, as shown also in FIG. 1, above a table or desk 60 installed indoors, it is installed integrally at a predetermined height or ceiling surface. The illumination device 10 with the image projection function projects various images 1 onto the illumination function of irradiating the illumination light 2 onto the upper surface of the table or desk and the upper surface (also referred to as display surface or projection surface) 61 of the table or desk 60. It is an illuminating device which has both the image projection function displayed. Note that the holder 40 in FIG. 1 is a holder for holding the pendant-type lighting device 10 with a video projection function in a state suspended from the ceiling surface 50 at a desired position, for example, aluminum or the like. A cylindrical pipe made of metal is shown. In FIG. 1, the holder 40 that is a pipe is attached to the ceiling surface 50, but may be attached to a wall or the like via a bending process or a joint.

  There is a high possibility that a table or desk 60 having a horizontal plane on which an image is projected by the image projection function will be illuminated by the illumination function when used in a state where the image projection function is not used. Therefore, it is desirable that at least a part of the area where the video is projected by the video projection function and the illumination range of the illumination light of the illumination function overlap.

  Note that it is desirable that the illumination device with a video projection function be configured so that the illumination light irradiated by the illumination function and the video projected by the video projection function can be turned on / off by installing a control unit. In this example, the user performs this operation via the operation panel 70 attached to the wall surface.

  Here, as described above, the illumination device 10 with a video projection function is fixed to a ceiling surface (or a wall) via a holder 40 that is a pipe. However, the installation position of the table or desk 60 may change due to rearrangement of furniture in the room. Thus, when the installation position of the table or the desk 60 is changed, it is assumed that there is a user's request to similarly change the projection position of the video 1 that is the projection video of the illumination device 10 with the video projection function. When the aspect ratio of the projected image is not 1: 1 but rectangular, the image has a longitudinal direction and a short direction. For example, as indicated by a broken line in FIG. 1, there may be a user's request to change the orientation of the rectangular video depending on the viewing content and viewing position. However, the method of changing the fixing position and fixing direction to the ceiling surface and wall of the lighting device 10 with the video projection function requires work and is not easy.

  Therefore, it is desirable that the illumination device with a video projection function 10 itself can be equipped with a function that can change and adjust at least one of the position or orientation of the projected video. However, it is desirable that the illumination device with a video projection function 10 has a configuration capable of maintaining a suitable appearance as the illumination device, unlike a normal projection type video device without an illumination function. In the embodiment of the present invention, a specific example of the illumination device 10 with a video projection function equipped with a function capable of changing and adjusting the position and orientation of the projected video in consideration of the above situation will be described.

  FIG. 2 shows an outline of the internal configuration of the illumination device 10 with a video projection function shown in FIG. As shown in FIG. 2A, for example, the inside of a main body (also referred to as a housing or a shade) 11 having a substantially cylindrical or conical shape formed by molding a synthetic resin mold is shown in FIG. As shown in FIG. 5B, for example, a plurality of semiconductor light emitting elements (LEDs) 22 are provided so that substantially uniform irradiation light can be obtained on the surface of the disk-shaped substrate 21 made of a metal having excellent thermal conductivity. Are arranged along the circumference, and as shown in FIG. 2C, a small projector having an outer shape for projecting and displaying various images. 30. Note that the diffusion plate 12 in the figure is provided so as to cover the lower opening of the main body 11, and is a so-called diffusion plate for diffusing the illumination light from the illumination light source 20 and uniformly irradiating it downward. Is shown. The opening 14 is an opening formed in a part of the diffusing plate 12, and an image from the small projector 30 is projected through the opening 14. In the above description, the outer shape of the main body (shade) 11 has been described as a substantially cylindrical or conical shape, but the present invention is not limited to this, and may have other shapes, for example, a box shape. .

  Moreover, the power supply unit 80 in FIG. 2 shows a power supply unit that converts commercial AC power input through a lighting fixture outlet (not shown) into a desired AC voltage or DC voltage. It is arranged on the upper surface of a disk-shaped holding plate 90 arranged on the upper part of the small projector 30, and the necessary power is supplied to the illumination light source 20 and the small projector 30 through the wiring shown by the curve in the drawing. Supply. The small projector 30 is incorporated in the main body (shade) 11 in an upright state so as to project the image light downward as indicated by a broken line in FIG. It is attached using a sheath member 31 formed in a substantially “U” -shaped outer shape so as to cover its outer periphery (specifically, in a rectangular opening formed in the disc-shaped holding plate 90) The small projector 30 is fixed by inserting the sheath member 31). Moreover, the support | pillar 91 and support | pillar 92 in a figure are the support | pillars extended from the said holding plate 90 up and down, and were respectively connected to the upper surface of the main body (shade) 11 and the said disk-shaped board | substrate 21. That is, each part is arrange | positioned in the desired position inside the said main body (shade) 11 by the structure mentioned above.

  FIG. 3 is a block diagram illustrating an example of a specific circuit configuration of the above-described illumination device 10 with a video projection function. The illumination device with a video projection function 10 includes a projection video display unit 100 having a video projection function (corresponding to the small projector 30 in FIG. 2) and a lighting unit 200 having an illumination light irradiation function. An operation signal input unit 301 is an operation button or a light receiving unit of a remote controller, and inputs an operation signal from a user.

  Next, the configuration of the projection type video display unit 100 will be described. The projection optical system 101 is an optical system that projects an image on the display surface 61 and includes at least one of a lens and a mirror. The display element 102 is an element that modulates transmitted light or reflected light to generate an image. For example, a transmissive liquid crystal panel, a reflective liquid crystal panel, a DMD (Digital Micromirror Device: registered trademark) panel, or the like is used. The display element driving unit 103 sends a drive signal corresponding to the video signal to the display element 102. The light source 105 generates light for image projection, and uses a high-pressure mercury lamp, a xenon lamp, an LED light source, a laser light source, or the like. The power source 106 converts an AC current input from the outside into a DC current and supplies power to the light source 105. Further, the power supply 106 supplies necessary DC currents to the other components. The illumination optical system 104 condenses the light generated by the light source 105, makes it more uniform, and irradiates the display element 102 with it. The cooling unit 190 cools each part that is in a high temperature state, such as the light source 105, the power source 106, or the display element 102, as necessary, using an air cooling method or a liquid cooling method. The operation input unit 107 is an operation button or a light receiving unit of a remote controller, and inputs an operation signal from the user. The operation input unit 107 may receive an infrared signal or a radio signal from the operation panel 70 of FIG. When the signal from the operation signal input unit 301 of the illumination device 10 with the video projection function is input to the projection type video display unit 100, the operation input unit 107 may be omitted.

  The video signal input unit 131 inputs video data by connecting an external video output device. The audio signal input unit 133 inputs an audio data by connecting an external audio output device. The audio output unit 140 can perform audio output based on the audio data input to the audio signal input unit 133. Further, the audio output unit 140 may output a built-in operation sound or an error warning sound. For example, the communication unit 132 is connected to an external information processing apparatus and inputs / outputs various control signals. The communication unit 132 may perform wired communication or wireless communication with the operation panel 70 of FIG.

  The nonvolatile memory 108 stores various data used for the projector function. The memory 109 stores video data to be projected and control data for the apparatus. The control unit 110 controls the operation of each connected unit.

  The image adjustment unit 160 performs image processing on the video data input by the video signal input unit 131. Examples of the image processing include scaling processing for enlarging, reducing, and deforming the image, bright adjustment processing for changing the brightness, contrast adjustment processing for changing the contrast curve of the image, and components obtained by decomposing the image into light components. Retinex processing for changing the weighting for each.

  The storage unit 170 records video, images, audio, various data, and the like. For example, video, image, audio, various data, etc. may be recorded in advance at the time of product shipment, and video, image, audio, various data, etc. acquired from an external device, an external server, etc. via the communication unit 132 may be used. It may be recorded. Video, images, various data, and the like recorded in the storage unit 170 may be output as projection video via the display element 102 and the projection optical system 101. The sound recorded in the storage unit 170 may be output as sound from the sound output unit 140.

  As described above, the projection type video display unit 100 can be provided with various functions. However, the projection display unit 100 does not necessarily have all the above-described configurations. Any configuration may be used as long as it has a function of projecting an image.

Next, the configuration of the lighting unit 200 will be described.
The control unit 201 controls each unit to be connected. The operation input unit 203 is an operation button or a light receiving unit of a remote controller, and inputs an operation signal from the user. The operation input unit 203 may receive an infrared signal or a radio signal from the operation panel 70 of FIG. When the signal from the operation signal input unit 301 of the illumination device 10 with the video projection function is input to the illumination unit 200, the structure without the operation input unit 203 may be used. The nonvolatile memory 204 stores various data used in the lighting unit 200.

  The power source 202 converts an AC current input from the outside into a DC current and supplies power to the light emitting element drivers (210, 220, etc.). Further, the power source 202 supplies necessary DC currents to the other units. The light emitting element drivers (210, 220, etc.) emit light from the light emitting elements (211, 212, 213, 221, 222, 223, etc.) based on the control of the control unit 201 using the power supplied from the power source 202. The light emitting element serves as a light source of illumination light emitted from the illumination unit 200. For example, in the example of FIG. 3, the light emitting element driver A210 collectively drives n light emitting elements A1, A2,... An (211, 212, 213, etc.) connected in series. The light emitting element driver A 210 changes the luminance, color, and the like of these light emitting elements based on the control of the control unit 201. Similarly, the light emitting element driver B220 collectively drives m light emitting elements B1, B2,... Bm (221, 222, 223, etc.) connected in series. The light emitting element driver B220 changes the luminance and color of these light emitting elements based on the control of the control unit 201. With this configuration, it is possible to control the luminance and color of a plurality of light emitting elements for each light emitting element driver. In the example of FIG. 3, two examples of a light emitting element driver and a set of a plurality of light emitting elements are shown, but one or three or more sets may be used. What is necessary is just to increase / decrease as needed.

  With the configuration described above, the illumination unit 200 can emit illumination light whose brightness or color is variable.

  Subsequently, in a lighting device having a video projection function, the details of the present invention are related to the means and mechanism that can suitably move and adjust the position of the video projected from the projector, which is a feature of the present invention. Specifically, Examples 1 to 5 will be described below.

<Example 1>
In the first embodiment, with respect to the entire illumination device 10 with a video projection function, that is, the main body 11 itself in which the illumination light source 20, the small projector 30, and the power supply unit 80 are disposed, the installation position of the device, that is, the ceiling The relative position with respect to the position (more specifically, the central axis) of the holder 40 which is a metal pipe fixedly attached to the surface 50 is variable. 4 shows the illumination device 10 with a video projection function according to the first embodiment, including its internal configuration, a top view of (A), a side view (sectional view) of (B), and (C). As shown in the bottom view, the content is mostly the same as in FIG. Therefore, detailed description of the same parts as in FIG. 2 is omitted here, and the rotation mechanism that is the feature thereof will be described below with reference to FIGS. 4, 5, and 6. FIG. Hereinafter, each side view used for description is a cross-sectional view for ease of description.

  As shown in FIGS. 4 and 5, a disc-shaped flange 41 is formed at the lower end of the pipe, which is the holding unit 40 to the ceiling surface of the apparatus, while the upper surface of the main body (shade) 11 is formed. A double disk part 111 and a disk part 112 are formed, and the flange part 41 is slidably inserted into a cylindrical gap formed between the disk part 111 and the disk part 112. In addition, an opening 115 having a diameter larger than the diameter of the holder 40 is formed in the center of the double disk part 111 and the disk part 112 on the upper surface of the main body (shade) 11. A gap 501 and a gap 502 are provided for adjusting the relative position of the main body (shade) 11. As a result, the main body (shade) 11 rotates around the Z-axis direction, which is an axis perpendicular to the image projection plane, by sliding between the upper surface of the disk-shaped flange 41 of the holder 40 and the lower surface of the disk portion 111. The position is also movable in a horizontal plane direction (X-axis-Y-axis direction) that is a plane that is parallel to the image projection plane. The movement range of the main body (shade) 11 can be adjusted by setting the gap 501 and the gap 502 to desired values at the time of design. Further, a fixing member 42 having a flange portion is disposed above the double disk portion 111 and the disk portion 112 so as to cover the disk portion 111 with the flange portion 41 at the lower end of the holder 40. Arranged and fixed to the holder 40. Further, a screw hole 43 is formed in a part of the flange portion of the fixing member 42 so that a tightening screw (lock screw) 44 is screwed as shown in FIGS. It has become.

  In FIG. 4B, the configuration in which the relative position with respect to the holder 40, which is a fixing member that does not change the relative position with respect to the ceiling or the wall, in the illumination device 10 with the video projection function is variable in cross section. This is the part indicated by the wide diagonal line.

  According to the configuration described above, as shown in FIG. 6 as well, the entire illumination device 10 with a video projection function described above, that is, a main body (shade) in which the illumination light source 20, the small projector 30, and the power supply unit 80 are arranged. 11 itself is movable in the horizontal plane direction (X-axis-Y-axis direction), and further rotates around the central axis (Z-axis direction) of the pipe that is the holding portion 40, as indicated by an arrow 600 in FIG. It becomes possible. That is, the image projected from the small projector 30 can be rotated with respect to the upper surface 61 of the table or desk 60 by rotating the main body (shade) 11 (the broken line on the table or desk 60 in FIG. In addition, the position of the projected image can be moved and adjusted in the X-axis-Y-axis direction (vertical and horizontal directions when the image is viewed from the front) by the movement in the X-axis-Y-axis direction. It becomes. In other words, the projection image can be rotated in one axis direction and moved in two axis directions. At that time, after loosening the tightening screw (lock screw) 44 and adjusting the rotation angle and moving position of the main body (shade) 11, the tightening screw 44 is retightened, whereby the center of the holder 40 is The position of the main body (shade) 11 with respect to the axis (Z-axis direction) can be set and adjusted to a desired position.

  As described above, the horizontal surface (the ridge portion 41 in the above example) that the fixing member whose relative position to the ceiling or the wall does not change has, and the member that includes the small projector 30 and the relative position of the fixing member is variable. By adopting a sliding mechanism with a horizontal plane (the disk portion 111 in the above example) and a position lock mechanism (clamping screw 44 in the above example), there is no need to provide a mechanism such as a gear or a rack, The moving and rotating functions of the projected image can be realized at a relatively low cost.

  An example of the movement of the projected video accompanying the movement of the main body (shade) 11 of the small projector described above in the X-axis-Y-axis direction is shown in FIGS. 7A to 7D using solid lines and two-dot chain lines. . At this time, the movement amount of the projected image is the same as the spatial movement amount of the main body (shade) 11. For example, when the gap 501 and the gap 502 are set so that the main body (shade) 11 can move up to ± 10 mm in the X axis-Y axis direction, the image can also move up to ± 10 mm in the X axis-Y axis direction. In addition, the movement and rotation of the projected image accompanying rotation about the Z-axis direction of the main body (shade) 11 of the small projector is shown using a solid line and a two-dot chain line in FIG.

  In the example described above, the projection lens 32 (see FIG. 2C) of the small projector 30 is described as being disposed at the center of the lower surface of the illumination device 10 with a video projection function. However, when the position of the projection lens 32 is not the center of the lower surface of the illumination device 10 with the video projection function, the position of the opening 14 formed in a part of the diffusion plate 12 is also matched with the position of the projection lens 32. Thus, those skilled in the art will naturally understand that they are formed at positions other than the central portion.

  According to the illumination device with a video projection function according to the first embodiment of the present invention described above, it is possible to suitably realize rotation and movement of the projected video. Further, since the rotation and movement of the image can be realized without changing the relative position of the diffusion plate 12 and the projection lens 32, the opening 14 of the diffusion plate 12 can be made to a minimum size, and the dust resistance is further improved. It is easy to further enhance the beauty of the lighting device.

<Example 2>
In the second embodiment, the relative position of the illumination device 10 with a video projection function described above, that is, the illumination light source 20 inside the main body (shade) 11, the small projector 30, and the power supply unit 80, with respect to the ceiling or wall is The relative position with the holder 40 which is an invariable fixing member is variable. On the other hand, the main body (shade) 11 has a structure in which a relative position is fixed with respect to the holder 40. FIG. 8 shows a lighting device 10 with a video projection function according to the second embodiment, including its internal configuration, in a top view of (A), a side view of (B), and a bottom view of (C). The contents are basically the same as those shown in FIG. Therefore, detailed description of the same parts as in FIG. 2 is omitted here, and the rotation mechanism that is the feature thereof will be described below with reference to FIGS. 9 and 8.

  As shown in FIG. 9, the pipe that is the holding portion 40 fixed to the ceiling or wall is fixed to the disk portion 111 that is the upper surface of the main body (shade) 11 by the fixing member 120. On the other hand, a double disc portion 94 and a disc portion 95 are attached to the upper portion of the lower portion via a support column 91 extending upward from the disc-shaped holding plate 90. An opening that is larger than the diameter of the pipe that is the holder 40 but smaller than the diameter of the flange 41 at the lower end is formed at the center. The difference between these diameters gives the sliding range described later. Further, a disc-shaped flange portion 41 of the holder 40 is slidably inserted into a gap formed between the disc portion 94 and the disc portion 95 (see the dotted arrow in FIG. 9). . That is, the double disk part 94 and the disk part 95 are movable in the horizontal plane direction (X-axis-Y-axis direction) with respect to the holder 40 fixed to the ceiling or wall, and in the Z-axis direction. It can be rotated as a center. In other words, the projection image can be rotated in one axis direction and moved in two axis directions. Note that a protrusion (so-called knob) 96 that can be held by a user's finger is attached to the upper disk part 94 of the double disk part with a cover ring 97 interposed therebetween. When the illumination device 10 with a video projection function is assembled, the protrusion 96 penetrates the half-moon shaped opening 113 formed in the disk portion 111 which is the upper surface of the main body (shade) 11 and protrudes to the outside. It is configured as follows.

  Similarly to the above-described embodiment, a rectangular opening 93 is formed in the substantially central portion of the disc-shaped holding plate 90, and a sheath member 31 for inserting the small projector 30 in an upright state is inserted. The disk-shaped illumination light source 20 is attached to the lower end portion of the support column 92 extending downward from the disk-shaped holding plate 90. Here, in order to facilitate understanding of the configuration of each member, the illustration of the small projector 30 and the power supply unit 80 mounted inside the main body (shade) 11 is omitted.

  In FIG. 8B, the configuration in which the relative position with respect to the holder 40, which is a fixing member whose relative position with the ceiling or the wall is invariable, in the illumination device 10 with a video projection function is variable in cross section. This is the part indicated by the wide diagonal line.

  According to the configuration described above, as illustrated in FIG. 9, the configuration that is a part of the above-described illumination device 10 with the video projection function, that is, the configuration including the illumination light source 20, the small projector 30, and the power supply unit 80, Inside the main body (shade) 11 fixed to the pipe which is the holding portion 40, it is movable in the horizontal plane direction (X axis-Y axis direction), and as indicated by an arrow 900, the central axis (Z Axis direction) is the center of rotation. That is, by rotating the double disk part 94 and the disk part 95, it becomes possible to rotate the image projected from the small projector 30 with respect to the upper surface 61 of the table or desk 60. By moving in the Y-axis direction, the position of the projected image can be moved and adjusted in the X-axis-Y-axis direction (up and down and left and right when the image is viewed from the front).

  In this way, the horizontal surface (the flange portion 41 in the above example) that the fixing member whose relative position with the ceiling or the wall does not change has, and the member that includes the small projector 30 and whose relative position with the fixing member is variable. By adopting a sliding mechanism with a horizontal plane (the disk portion 94 in the above example) and a position lock mechanism (clamping screw 44 in the above example), there is no need to provide a mechanism such as a gear or a rack. The moving and rotating functions of the projected image can be realized at a relatively low cost.

  In the second embodiment, the small projector 30 can move in the X-axis and Y-axis directions and rotate around the Z-axis inside the main body (shade) 11. Therefore, as shown in FIG. 8C and FIG. 9, the opening 14b formed in a part of the diffuser plate 12 takes into account the movement of the projection lens 32 in the X-axis-Y-axis direction. The diameter needs to be larger than the diameter of the projection lens 32.

  Note that the movement of the projected image accompanying the movement of the small projector 30 in the X-axis-Y-axis direction inside the main body (shade) 11 described above is the solid line in FIGS. 7A to 7D as in the first embodiment. And a two-dot chain line. At this time, the movement amount of the projected image is the same as the spatial movement amount of the small projector 30. For example, when the diameter of the holder 40, the diameter of the collar 41, and the structure of the peripheral configuration that limits the movement range are set so that the small projector 30 can move up to ± 10 mm in the X axis-Y axis direction, Can move up to ± 10 mm in the X-axis to Y-axis directions. In addition, the rotation of the projection image accompanying the rotation around the Z-axis direction of the small projector 30 inside the main body (shade) 11 is represented by a solid line and a two-dot chain line in FIG. Shown.

  Further, when the position of the projection lens 32 is not the center with respect to the rotation center of the small projector 30, the opening 14b formed in a part of the diffusion plate 12 may be modified as, for example, the diffusion shown in FIG. As shown also in the opening 14c of the plate 12, the shape may be formed to match the movement of the position of the projection lens 32, in this example, a substantially half-moon shape.

  Note that the size of the opening 14b can be minimized by arranging the projection lens 32 at the center of the rotation center of the small projector 30.

  Further, when moving or adjusting the position of the projected image from the projector, the user loosens the tightening screw (lock screw) 44, grasps the protrusion 96 described above, and holds the small projector 30 inside the main body (shade) 11. It is possible to set and adjust the position by adjusting the rotation angle and moving position of the member to be held, and then retightening the fastening screw 44 again.

  According to the illumination device with a video projection function according to the second embodiment of the present invention described above, rotation and movement of the projected video can be suitably realized. Further, the relative position and orientation of the main body (shade) 11 is fixed with respect to the ceiling and the wall, and there is an effect that the appearance as the lighting device is stabilized even when the position and angle of the image are adjusted.

  Subsequently, for the illumination device 10 with a video projection function that moves the position of the projected video by changing the relative position of the display element and the projection optical system (for example, a projection lens), as Examples 3 to 5, This will be described in detail with reference to the drawings.

  The principle of the variable function of the relative position between the display element and the projection optical system (for example, a projection lens) will be described with reference to FIG. Video light emitted from a light source and modulated by a display element (for example, a transmissive liquid crystal panel) is magnified by a projection lens and projected onto a projection surface, but as shown by dotted lines and arrows in FIG. By moving the projection lens in a direction parallel to the display element surface, the relative position between the optical axis of the projection optical system and the display element which is an optical “object” can be varied. Then, the display position on the projection surface of the enlarged projection image, which is an optical “image”, moves as shown in FIG. Here, the amount of movement of the projected image is obtained by multiplying the amount of movement of the relative position between the display element and the projection optical system by the enlargement ratio (the size of the “image” relative to the size of the “object”) by the projection optical system. Become. Therefore, the amount of movement of the projected video increases as the enlargement ratio increases.

  If the function for changing the relative position between the display element and the projection optical system is used, the illumination with the image projection function can be used as compared with the case where the position of the small projector 30 is changed without changing the relative position between the display element and the projection optical system. It becomes possible to move the position of the image projected from the apparatus 10 on the projection surface within a larger range. As a result, it is possible to suitably set and adjust the position of the projected image.

  The effect can be obtained by changing the relative position between the display element and the projection optical system. Therefore, the spatial position of the display element may be fixed and the optical axis position of the projection optical system may be changed. The spatial position of the display element may be varied by fixing the optical axis position of the optical system.

<Example 3>
In the third embodiment, the position of the projected image can be moved in a larger range by using the relative position variable function between the display element and the projection optical system described above. In the third embodiment, in the illumination device 10 with the video projection function described above, the relative position of the projection lens 32 that is a projection optical system in the small projector 30 is fixed to the ceiling or wall, and the display element in the small projector 30 The part including the structure is movable and rotatable. Thereby, it is possible to change the relative positional relationship between the optical axis of the projection optical system and the display element.

  FIG. 12 shows the illumination device 10 with a video projection function according to the third embodiment, including its internal configuration, with a top view of (A), a side view of (B), and a bottom view of (C). The contents are basically the same as those shown in FIG. Therefore, detailed description of the same parts as in FIG. 2 is omitted here, and the rotation mechanism that is the feature thereof will be described below with reference to FIGS. 13 and 12.

  As is clear from FIG. 13, the pipe that is the holding portion 40 to the ceiling surface is fixed to the disk portion 111 that is the upper surface of the main body (shade) 11 by the flange portion 41 and the fixing member 120 at the lower end. . Further, a smaller flange 45 is formed below the flange 41, and a shaft 46 and a disk-shaped member 47 are integrally formed at the lower end of the flange 45.

  On the other hand, a cylindrical member 33 extends upward from the upper surface of the sheath member 31 for incorporating the small projector 30 in an upright state, and a convex portion is formed on a part of the outer periphery at the tip of the member 33. The formed disk-shaped member 34 is integrally formed. A cylindrical space having a diameter larger than the diameter of the disk-shaped member 47 formed at the lower end of the holder 40 is formed inside the disk-shaped member 34, and the disk-shaped member 47 is formed on the upper surface thereof. A circular opening having a diameter smaller than the diameter of the shaft portion 46 but larger than the diameter of the shaft portion 46 is formed.

  That is, a disk-shaped member 47 at the lower end of the holder 40 is movably accommodated in the internal space of the disk-shaped member (hereinafter also referred to as a hanging member) 34. The diameter of the circular opening on the upper surface of the disk-shaped member 34 that is a suspension member is larger than the diameter of the shaft portion 46, but is smaller than the diameter of the disk-shaped member 47. The disc-shaped member 34 that remains is retained at the lower end of the holder 40 and can be moved and rotated. The movement range of the disk-shaped member 34 is set to a desired value at the time of designing the gap 1301 between the disk-shaped member 47 and the disk-shaped member 34 and the gap 1302 between the shaft 46 and the circular opening on the upper surface of the disk-shaped member 34. Can be adjusted.

  In addition, a half-moon shaped opening 113 is formed in the disk portion 111 which is the upper surface of the main body (shade) 11, and a projection 96 that can be held by a user's finger through the opening 113 is a covering ring. 97 is provided in between. Correspondingly, a protrusion 96 is attached to a convex portion that is a part of the outer periphery of the disc portion on the upper side of the double disc portion in the disc-like member 34 that is a hanging member. In addition, when the lighting device 10 with the video projection function is assembled, the protrusion 96 penetrates the opening 113 and protrudes to the outside. Therefore, the user rotates the protrusion 96 around the central axis (Z-axis direction) when moving the portion including the display element in the small projector 30 in the horizontal plane direction (X-axis-Y-axis direction). It can be used when. In other words, the projection image can be rotated in one axis direction and moved in two axis directions.

  The position lock mechanism for the movement and rotation may be a mechanism in which the joint portion between the projection 96 and the disk-like member (suspending member) 34 is screwed and locked by screw tightening. Alternatively, although not shown in FIG. 13, as shown in FIG. 12A, in order to fix the rotation and movement separately from the projecting portion 96, the disc portion 111 which is the upper surface of the main body (shade) 11. A tightening screw (lock screw) 44 may be provided.

  In FIG. 12B, the configuration in which the relative position with respect to the holder 40, which is a fixing member whose relative position to the ceiling or wall is invariable, in the illumination device 10 with the video projection function is variable in cross section. This is the part indicated by the wide diagonal line.

  In the third embodiment, as shown in FIG. 13, an illumination light source 20 in which a plurality of semiconductor light emitting elements (LEDs) are arranged on a substrate 21 is fixed to a main body (shade) 11. A circular opening 23 is formed at the center. Therefore, there is no obstacle when the portion including the display element of the small projector 30 moves and rotates.

  On the other hand, the projection lens 32 whose relative position is variable with the portion including the display element in the small projector 30 forms a hook-shaped part 321 at the lower end thereof, and the hook-shaped part 321 is attached to the bottom of the main body (shade) 11. The diffusion plate 12 is fixed on the surface. In this example, the projection lens 32 is fixed to the position of the opening provided in the central portion of the diffusion plate 12 using the flange 321.

  According to the above-described configuration, the portion including the display element of the small projector 30 can be rotated and moved relative to the projection lens 32 fixed to the central portion of the diffusion plate 12. This makes it possible to realize the function of changing the relative position between the display element and the projection optical system described above. At that time, the user releases the position lock mechanism by loosening the lock as described above, and grasps the protrusion 96 and the like, and the rotation angle and movement of the small projector 30 inside the main body (shade) 11. Adjust the position. Thereafter, the position can be set and adjusted by locking the position lock mechanism by retightening the position.

  In the above-described example, the example in which the projection lens 32 is fixed to the diffusion plate 12 has been described. However, the projection lens 32 is a member other than the diffusion plate 12 as long as it is a member whose relative position to the main body (shade) 11 is fixed. You may fix to this member.

  In the above example, the projection lens 32 of the small projector 30, the disk-shaped member 47, the rotation center of the portion including the display element of the small projector 30, and the center of the holder 40 are at the center position of the main body (shade) 11. The example which is arranged on the straight line in the vertical direction has been described. However, it is also possible to arrange the projection lens 32 of the small projector 30 at a position that does not coincide with the center of the holder 40 or a position that is offset from the center position of the main body (shade) 11. In this case, the rotation center of the portion including the display element of the small projector 30 may be set to a position offset in accordance with the offset position of the projection lens 32 of the small projector 30.

  An example of the movement of the projected video accompanying the movement of the portion including the display element of the small projector 30 in the X-axis-Y-axis direction using solid lines and two-dot chain lines in FIGS. Show. Since the projection lens 32 is fixed to the diffusion plate 12 and the like, and the relative position with respect to the ceiling or the wall is unchanged, the light of the display element and the projection lens 32 is moved by the movement of the portion including the display element of the small projector 30. The relative position of the axis in the X axis-Y axis direction changes. At this time, the amount of movement of the projected image is an amount obtained by multiplying the amount of change in the relative position between the display element and the optical axis of the projection lens 32 in the X-axis-Y-axis direction by the enlargement ratio of the projection optical system.

  For example, the display element has a rectangular image display surface with a diagonal length of 0.6 inches, and a rectangular image with a diagonal length of 30 inches is projected onto the upper surface 61 of the table or desk 60 via the projection lens 32. The magnification of the projection optical system is 50 times. Here, when the gap 1301 and the gap 1302 in FIG. 13 are set so that the portion including the display element of the small projector 30 can move up to ± 10 mm in the X-axis-Y-axis direction, The maximum amount of movement in the Y-axis direction is ± 500 mm.

  Note that the rotation of the projected image accompanying the rotation about the Z-axis direction of the portion including the display element of the small projector 30 is shown by using a solid line and a two-dot chain line in FIG. The rotation effect of the projected image of the third embodiment is almost the same as that of the first and second embodiments.

  In the third embodiment described above, the movement of the image is different from the first and second embodiments in that the function of changing the relative position between the display element and the projection optical system is used. Even if the movement amount is the same as in the first and second embodiments, a larger moving amount of the video can be secured. Therefore, even when the user rearranges the table or the desk 60 in the room, the user does not perform the construction to change the fixing position or fixing direction to the ceiling surface or wall of the lighting device 10 with the video projection function. An image can be easily projected on the upper surface 61 of the table or desk 60 after the rearrangement.

  Further, in the third embodiment described above, since the relative position between the projection lens 32 and the diffusion plate 12 remains fixed even if the position of the projection image is moved, the diffusion plate considering the moving range of the projection lens 32 is taken into account. It is not necessary to enlarge the 12 openings 14. Therefore, the size of the opening 14 can be minimized, the dustproofness can be easily improved, and the aesthetic appearance of the lighting device can be further improved.

  That is, according to the illuminating device with a video projection function according to the third embodiment described above, it is possible to more easily expand the moving range of the projected video while further improving dustproofness and further enhancing the beauty as the illuminating device. it can.

<Example 4>
Subsequently, as another example of enabling the position of the projected image to be moved by using the above-described relative position variable function between the display element and the projection optical system, the illumination device 10 with the image projection function according to the fourth embodiment will be described. This will be described in detail below with reference to FIGS. In the fourth embodiment, as shown in the top view of FIG. 15A, the side view of FIG. 15B, and the bottom view of FIG. A part including the display element of the small projector 30 is fixedly disposed together with the power supply unit 80 and the like, but the position of the projection lens 32 of the small projector 30 can be moved and adjusted. Other components may be fixed to the main body (shade) 11. For this reason, the internal configuration is basically the same as that shown in FIG. Therefore, detailed description of the same parts as in FIG. 2 is omitted here, and a mechanism for moving the relative position between the small projector 30 and the projection lens 32, which is a feature thereof, will be described below with reference to FIGS. 16 and 15. To do.

  In Example 4, as shown also in FIG. 16, a flange 321 is formed at the tip of the projection lens 32 constituting the small projector 30 disposed in the main body (shade) 11, and a part of the flange 321 is formed. Is formed with a protrusion (so-called knob or knob) 322 that can be held by a finger or the like. On the other hand, in the central portion of the diffusion plate 12 attached to the bottom of the main body (shade) 11, the projection lens 32 is taken into consideration in the X-axis-Y-axis direction in the same manner as in the second embodiment. An opening 14d having a diameter larger than the diameter of the opening 14d is formed. Further, an opening 15 is formed adjacent to the opening 14d, and the opening 15 is an opening for projecting the protrusion 322 to the outside when the apparatus is assembled. Is set to such an extent that necessary movement in the X-axis-Y-axis direction is possible.

  In addition, a cover portion 323 that is a member that covers the flange portion 321 of the projection lens 32 from above is attached to the diffusion plate 12. As is apparent from FIG. 16, the cover portion 323 has a flange 324 formed at the bottom thereof, and a circular opening 325 for projecting the projection lens 32 is formed at the center thereof. Yes. In the state where the projection lens 32 is inserted into the cover portion 323 through the opening 325 and attached to the diffusion plate 12, the projection lens 32 has the flange portion 321 at the cover portion 323 and the diffusion plate 12. Can be moved in a horizontal plane in the X-axis-Y-axis direction.

  In FIG. 15B, the configuration in which the relative position with respect to the holder 40, which is a fixing member whose relative position with respect to the ceiling or the wall is invariable, in the illumination device 10 with a video projection function is variable in cross section. This is a portion including the projection lens 32 indicated by a wide oblique line.

  The fourth embodiment has a moving function (also referred to as a moving mechanism) that makes it possible to move the position of the projected image. Hereinafter, a position fixing mechanism (also referred to as a lock mechanism) for a moving function will be described. As locking means for fixing the position of the projection lens 32 in the moving mechanism, first, a fastening screw 36 shown in FIG. 15C is prepared at the tip of the projection 322 shown in FIG. The movement function may be locked by tightening 36, that is, the position of the projection lens 32 may be fixed. Further, as shown in FIG. 15C, an opening for the tightening screw 44 may be provided at a position different from the protrusion 322, and the movement function may be locked by tightening the tightening screw 44. good. In addition, a fastening screw may not be prepared at the tip of the protrusion 322 from the opening 15, and the moving function may be locked by friction caused by sandwiching the flange 321 between the cover 323 and the diffusion plate 12. Good. In this case, an urging mechanism such as a spring may be provided between the cover portion 323 and the flange portion 321.

  Moreover, you may comprise so that the collar part 321 can be moved with an exclusive tool, without providing the projection part 322. FIG. In this case, the diffusion plate 12 is provided with the opening 15, the collar portion 321 is provided with a dedicated tool attaching / detaching hole, and the dedicated tool attaching / detaching hole is provided only when the user moves the projection lens 32. And the position of the projection lens 32 may be moved. In this case, since it is not necessary to project the protrusion 322 under the diffusing plate 12, the aesthetics of the lighting device can be more suitably maintained.

  According to the above-described configuration, the image light projected from the projection lens 32 is provided by the function of changing the relative position between the display element and the projection optical system as the projection lens 32 moves in the horizontal plane in the X-axis-Y-axis direction. It is possible to move and adjust in a desired direction within a larger range. That is, it is possible to move the projected image in the biaxial direction. At that time, the user loosens the fastening screw 36 or the fastening screw 44 and then uses the projection 322 or the like to thereby position the projection lens 32 on the horizontal plane in the X-axis-Y-axis direction. Adjust. Thereafter, the position of the projection lens 32 is set and fixed by retightening the tightening screw 36 or the tightening screw 44. In the case of the method of locking by friction as described above, a tightening screw is not necessary.

  An example of the movement of the projected video accompanying the movement of the projection lens 32 of the fourth embodiment in the X-axis-Y-axis direction is shown in FIGS. 17A to 17D using solid lines and two-dot chain lines. As the projection lens 32 moves, the relative position of the display element and the optical axis of the projection lens 32 in the X-axis-Y-axis direction changes. At this time, the amount of movement of the projected image is an amount obtained by multiplying the amount of change in the relative position between the display element and the optical axis of the projection lens 32 in the X-axis-Y-axis direction by the enlargement ratio of the projection optical system.

  For example, the display element has a rectangular image display surface with a diagonal length of 0.6 inches, and a rectangular image with a diagonal length of 30 inches is projected onto the upper surface of the table or desk 60 via the projection lens 32. The magnification of the projection optical system is 50 times. Here, when the diameter of the opening 15, the diameter of the flange 321, the inner diameter of the cover 323, and the like are set so that the projection lens 32 can move up to ± 10 mm in the X-axis-Y-axis direction, The amount of movement in the X-axis to Y-axis directions is a maximum of ± 500 mm.

  In the above example, the projection lens 32 of the small projector 30 has been described as being disposed in the central part of the main body (shade) 11 and the diffusion plate 12. However, when the projection lens 32 is located at a position other than that, the positions of the opening 14d and the opening 15 formed in the diffusion plate 12 are also the positions of the projection lens 32 together with the mounting position of the projection lens 32. It may be configured to move according to.

  According to the illumination device with a video projection function according to the fourth embodiment described above, a mechanism for moving the projection lens 32 is provided, and the relative position between the projection optical system and the display element is made variable, so that the movement range of the projected video is obtained. Can be more suitably enlarged. Further, since the position of the portion including the display element of the small projector 30 is fixed and only the projection lens 32 is variable, the structure in the main body (shade) 11 can be simplified.

<Example 5>
In the above-described embodiment, particularly in Embodiment 4, the small projector 30 disposed in the main body (shade) 11 has been described as being fixed. However, in the illumination device with a video projection function according to the fourth embodiment, if a mechanism that allows the entire main body (shade) 11 including the small projector 30 to rotate about the Z axis is provided, the fourth embodiment will be described. It is also possible to rotate the video in addition to moving the video. Hereinafter, the illumination device with a video projection function according to the fifth embodiment will be described with reference to FIGS. 18 and 19.

  More specifically, as shown in FIG. 18, in the configuration of the illumination device 10 with the video projection function according to the fourth embodiment, the fifth embodiment further includes the above-described implementation on the upper portion of the main body (shade) 11. This can be realized by incorporating a rotation mechanism similar to the rotation mechanism described in Example 1. In this case, the diameter of the opening 115 formed in the central part of the double disk part 111 and the disk part 112 in FIG. 5 of the first embodiment is almost the same as the diameter of the holder 40. That's fine. That is, in the fifth embodiment, it is not necessary to make the gap 501 and the gap 502 large in order to enable movement in the X-axis-Y-axis direction as in the first embodiment.

  That is, according to the fifth embodiment, not only the projection lens 32 separated from the small projector 30 is moved to the horizontal plane in the X axis-Y axis direction but also the main body (shade) 11 including the small projector 30 according to the configuration. The whole is also rotatable around the Z axis. That is, the projection image can be moved in two axes and rotated in one axis.

  An example of the movement of the projected image accompanying the movement of the projection lens 32 of the fifth embodiment in the X-axis-Y-axis direction is shown in FIGS. 19A to 19D using solid lines and two-dot chain lines. The effect of moving the projection lens 32 in the X-axis-Y-axis direction is the same as in the fourth embodiment.

  Further, the rotation of the projected image accompanying the rotation around the Z-axis direction of the portion including the display element of the small projector 30 is indicated by using a solid line and a two-dot chain line in FIG. The rotation effect of the projected image is almost the same as in the first and second embodiments.

  In the fifth embodiment described above, the position of the projection image can be suitably moved within a larger range by the function of changing the relative position between the display element and the projection optical system, and the rotation of the projection image can be performed by the rotation mechanism. A possible illumination device with a video projection function can be realized.

  In each of the embodiments described above, the example in which the plane by the X axis and the Y axis is a horizontal plane has been described. In addition, an example in which the Z axis extends in the vertical direction has been described. However, since the movement mechanism in the plane by the X-axis and Y-axis described in each embodiment of the present invention is a mechanism for moving the image on the projection surface in the X direction and the Y direction, this plane is a horizontal plane. Any plane may be used as long as the plane is parallel to the image projection plane. In addition, since the rotation mechanism about the Z axis described in each embodiment of the present invention is a mechanism for rotating the image on the projection surface about the Z axis, the rotation axis that is the Z axis is in the vertical direction. Any axis may be used as long as it is perpendicular to the image projection plane.

  Further, the small projector 30 described in each of the above embodiments does not necessarily include the entire projector (all of a plurality of elements constituting the projector). That is, the small projector 30 may be a part as long as it is a unit including a display element of the projector.

  In the above, various illumination devices with a video projection function according to various embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail for the entire system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 10 ... Illuminating device with a video projection function, 11 ... Main body (casing body, shade), 12 ... Diffusing plate, 14, 15 ... Opening part, 20 ... Light source for illumination, 21 ... Substrate, 30 ... Small projector, 31 ... Sheath member, 32 ... Projection lens, 33 ... Member, 34 ... Disk-like member (hanging member), 40 ... Holder (pipe), 41 ... Gutter, 42 ... Fixing member, 43 ... Screw hole, 44 ... Fastening screw, 90 ... holding plate, 91, 92 ... support, 111, 112 ... disk part, 115 ... opening, 501, 502 ... gap.

Claims (6)

An illumination device that emits illumination light and is held by a holder for fixing to a ceiling surface or wall,
A light source for generating the illumination light disposed inside the housing;
A diffusion plate attached to a part of the housing, and a diffusion plate for diffusing illumination light from the light source;
A projector that is disposed within a space formed by a part of the casing and the diffusion plate, and projects an image on a projection surface;
Moving means for allowing the whole or a part of the projector to move in a direction parallel to the projection surface;
Equipped with a,
The relative position with respect to the holder is fixed to the housing and the diffuser plate unchanged.
An illuminating device characterized in that a relative position of the projector to the holder is variable in a direction in a plane parallel to the projection surface by the moving means . The lighting device according to claim 1 ,
The lighting device, wherein the projector is rotatable about an axis perpendicular to the projection plane within the space formed by the housing and the diffusion plate by the moving means. An illumination device that emits illumination light and is held by a holder for fixing to a ceiling surface or wall,
A light source for generating the illumination light disposed inside the housing;
A diffusion plate attached to a part of the housing, and a diffusion plate for diffusing illumination light from the light source;
A projector that is disposed within a space formed by a part of the casing and the diffusion plate, and projects an image on a projection surface;
A moving means for moving the relative position of the projection lens of the projector with respect to the display element of the projector in a direction parallel to the projection surface;
Equipped with a,
The projection lens is fixed in a state in which the relative position is unchanged with respect to the diffusion plate,
An illuminating device characterized in that a relative position of the projector with a configuration including a display element is variable by the moving means with respect to the diffusion plate . The lighting device according to claim 3 .
The illumination device according to claim 1, wherein the configuration including the display element of the projector is rotatable about the axis perpendicular to the projection plane by the moving means. An illumination device that emits illumination light and is held by a holder for fixing to a ceiling surface or wall,
A light source for generating the illumination light disposed inside the housing;
A diffusion plate attached to a part of the housing, and a diffusion plate for diffusing illumination light from the light source;
A projector that is disposed within a space formed by a part of the casing and the diffusion plate, and projects an image on a projection surface;
A moving means for moving the relative position of the projection lens of the projector with respect to the display element of the projector in a direction parallel to the projection surface;
With
The display element of the projector is fixed in a state where the relative position with respect to the diffusion plate is unchanged,
The lighting device, wherein the moving means for moving the projection lens is attached to a part of the diffusion plate. The lighting device according to claim 5 ,
The lighting device further comprises means for allowing an integral structure including the housing, the projector, and the diffusion plate to rotate about an axis perpendicular to the projection surface.

Images